Which of the following is NOT an example of wireless networking communications?

DSL, or Digital Subscriber Line, is a wired communication technology that provides internet access through telephone lines. It requires a physical connection between the subscriber's premises and the service provider's infrastructure, meaning it does not qualify as wireless networking. In contrast, Wi-Fi is a wireless technology that connects devices to a local network, Bluetooth allows for short-range wireless data exchanges between devices, and cellular networks use radio waves to communicate with mobile devices over large distances.